Diamond die



Aug. 31,1926. r 1,597,927'

A. slMoNs DIAMOND DIE Filednec. 21. 1923 www@ BY flow@ ATTORNEY@ Patented Aug. 31, 1926.

PATENT OFFICE.

' .ABRAHAM SIMONS, NEW YORK, N. Y.

DIAMOND DIE.

My invention relates to a new and .improved form of diamond die and a new and improved method of manufacturing the same.

One of the objects of my invention is to provide a new and improved diamond die and a new and improved method of .making a die of this'character, whereby breakage of thediamond will be minimized and practically eliminated.

Another object of my invention is to rovide a new and improved diamond die w ich shall be especially applicable'for the utlization of large diamonds.

Another object of my invention is to provide a new and improved form of diamond die in which the diamond is held in a metal body and the metal body is permitted a certain freedom of lateral expansion when the diamond is in use.

Another object of my invention is to provide a new and improved form of diamond die in which the diamondis free to expand together with the metal holding means, when the diamond becomes heated relatively to the said metal holding means by reason of the wire passing through it.

Another object of my invention is to provide a new and improved form of diamond die in which the diamond is held in a metal holding ring by meansl of an intermediate series of completely or partly separated metal members. I l

Other objects of my invention will be set forth in the following description and drawings which describe a preferred embodiment of my invention.'

Fig. 1 is a vertical central section.

Fig. 2 is an end view.

Fig. 3 is an endview showing a different embodiment of my invention. Fig. 4 is an end view showing-another embodiment of my invention. l

Fig. 5 is an end View showing another embodiment of my invention.

My invention is particularly applicable to the class of diamond die described in my reviously issued Patents, No. 1,400,224, and

My experience has shown that when a dia- .mond of a relatively large size is used in a die of this character andthe diamond is heated by the passage of the wire through it, that this sometimes results in the crackingl off and is again used. The reasons for this are -of the diamond after the structure has cooled Application led December 21, 1923. Serial No. 681,974.

believed to be as follows although I do not wish to limit myself to any particular the-' ory for the improved results secured by the structure herein illustratedz A diamond is a poor conductor of heat and when the diamond is heated because of the passage of the wire through it, it tendsto expand so as to also expand the metal holding means immediately surrounding the same whichV are illustrated in my said former patents. If these metal holding means are not-free to expand to a certain limited extent in a direction lateral to the axis of the die, then the pressure caused by the expansion of the diamond causes a creeping of the said metal holding means ini a longltudinal direction. Hence, when Vthe die is not used and the parts thereof are permitted to cool oli", the diamond tends to shrink away from the surrounding metal means. It expands so slowly when t-he die is again put into serve ice that the cold diamond is not reinforced by thesurrounding metal walls and hence it cracks and this has been a source of substantial expense in the use of these dies.

l According to my invention the metal means surrounding the diamond are permitted a certain lateral freedom of move-l ment so that the bored diamond is subjected to a continuous internal pressure whether the diamond is hot or cold and under all vconical bore of the ring 1 is forced under pressure into the ring 1 whereby aninternal vpressure is produced in the diamond 3-is imbedded in the n the material ofthe nib 2 is compressed against the-entire outer surface ofthe diamond Hence the internal pressure produced upon the nib 2 as before mentioned, is imparted to every portion of the outer surface ofthe diamond 3 so that an inner' pressure 1s produced upon the bore 4 of the diamond 3. This .pressure isnot great enough lto crack the diamond as a diamond can withstanda considerable pressure if itv is graduallyapplied. Hence asvb'efore explamed in my previous Patents No. 1,400,224 and No. 1,420,223, the outward disruptive to the outer walls of the diamond 3 so that the nib 2 is really formed of three entirely mond.

different portions.' This can be accomplished by originally forming the nib 2 of a greater length than is required for the die, forming the slots 7 in that portion of the nil:

which is intended to be utilized in the die;

forcing the nib into position in the manner before described and shown in my said previously issued patents and then cutting away the surplus portion of the nib which has been allowed to remain solid. .The cuts` 7 are formed in the nib after `the diamond has been firmly imbedded therein according to the method described in my previously issued patents. i

If desired, the cuts 7 need not extend completely to the outer wall of the diamond although I prefer to dothis and a very thin continuous annular portion of the nib 2 may be allowed to remain surrounding the diamond 8. I prefer to make the width of said cuts 7 as thin as possible and preferably between .005 of an inch to .010 of an inch. Hence every portion of the diamond is suhject to the internal pressure before' nientioned except the three very tiny portions4 thereof corresponding to' vthe three cuts 7 .and these cuts 7 aremade so narrow that they do not affect the pressure on the dia- However, when the diamond expands because of the utilization of the die, the three portions of the nib 2 are free to move outwardly or' laterally so that the ring l is caused to expand laterally to a very slight degree. The ring l has the bore thereof separated from the nib 2 adjacent the three substantial cutout portions 6 so that the interior bore ofthe ring 1 is able to flatten slightly at the three free arcs thereof and hence the entire structure acts like a-lateral spring which subjects the diamond to a continuous inner pressure and is free to yield slightly when the diamond expands, while subjecting it to a continuous inner pressure. l

The embodiment illustrated in Fig. 3 clearly shows that the nib 2 may have only a single slot or cut 7 and the number of slots may be varied -without'departing from my invention.

In the embodiment shownin Fig. 4, the

, vLezama? nib 2 is provided with a plurality of slots 7. The nib 2 contacts with the interior of ring 1 save at those portions of the periphery of the said nib, which correspond to the outer ends of the slots 7. Hence each of the four portions into which the nib 2 .has been divided by tlie'slots, is free to yield laterally to a slight but sufiicient extent, when the said central portion of the said nib 2 is subjected to an outer` stress. Hence the internal surface of the ring 1 is provided with four short arcs, each said arc corresponding to the outer end of one of the slots 7. It is obvious that' `2. In this embodiment when the diamond expands, the nib and the ring are free to expand laterally ,because of the slots 7 and 8 so that a continuous lateral pressure is exerted upon the diamond under all conditions of use thereof and at all times. The nib 2 illustrated in Fig. 5 could also be made without the cut out portions as lillustrated for example, in Fig. 4.

The ring l and the nib 2 may be made of any suitable meta-l as Monel metal, a low carbon steel and the like.

By Way lowing dimensions. ete'.o of the diamond is approximately .25 inches then I prefer that the nib should have a mean external diameter of .50 inches and the ring should have an external diameter of one inch. s

I do not Wish to be limited to my d1 inensions but it is important that the ring and nib should be made of s uiiicient size to produce the proper lateral expansion with respect to the size of the diamond.

If desired, the outer ring 1 could be replaced by a series of rings tightly fitting one within the other so asto allow for a certain additional freedom of lateral expansion due to the fact that these rings would notl fit perfectly one within the other.

It is obvious that especially in the embodiment shown in Fig. 5 when the nib 2 is forced into position under considerable pressure that this results in the lateral expansion of theholding ring so that a springy effect is originally secured and this springy effect is permanent and becomes greater as the diamond is expanded. j

, I have shown a preferred embodiment of my invention, but it is clear thatnumerous changes and omissions could be made Without departing from its spirit and I do of illustration, I give the fol- If the external diamv not Wish to be limited to the details before mentioned. 4

I claim and metal holding means surrounding the said diamond, the said diamond and said metal holding means being provided with a bore, the said metal holding means being adapted to yield in a direction lateral .to

the axis of the said bore.

2. A diamond die comprising a diamond surrounded by metal holding means, the said holding means and diamond having a common bore, the said metal holding means being held in an outer'ring, the exterior of said holding means and the interior of said outer ring having a corresponding conical contour so that When the said metal holding means is forced into said outer ring, the said metal holding -means is compressed in a direction lateral to the axis of the said common bore, the said metal holding means being free to expand with respect to the said I' ring. l. A diamond die comprising a diamond 3.' A diamond diefcomprising an outer ring, a nib held Withinthe said ringand having a diamond therein', the'said nib and diamond4 being provided With a common bore they said nib having a portion thereof spaced from the adjacent interior portion of the ring.

4. A diamond die comprising a ring and a slotted nib held therein, the said nib having a 'diamond held therein, the said nib and ldiamond being provided .with a common ore.

5. A die according to claim 3 in which the' said nib is slotted.

`In testimony whereof I hereunto atlix my signature.

ABRAHAM SIMONS. 

